Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7001243 | Tribology International | 2018 | 36 Pages |
Abstract
Increasing performance of IC engines often leads to higher combustion temperatures causing premature failure of exhaust valves. This paper presents for the first time a tribological assessment of hollow head & sodium filled valves (HHSVs) produced using a new and novel manufacturing process. Tests were conducted on HHSVs using bespoke bench-top wear and fatigue apparatus and they survived defined durability tests. Compared to traditional solid valves; the highest temperature of the hollow stem & sodium filled valves decreased from 745â¯Â°C to 590â¯Â°C, the new design and manufacturing process did not adversely affect the classical wear mechanisms (e.g. oxidation accelerated adhesion) or the material loss magnitude, and the design of HHSVs gives a 16.1% reduction in mass.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Colloid and Surface Chemistry
Authors
Fuqiang Lai, Shengguan Qu, Yong Duan, Roger Lewis, Tom Slatter, Lianmin Yin, Xiaoqiang Li, Huahuan Luo, Ge Sun,